SetFocus does not work

[epsilon]

Hi there

Trying to set focus by

Code: [Select]

Edit1.SetFocus;  the following errormesage occurs:

1) Project project1 raised exception class 'EInvalidOperation'

An appliction.exe is created but if I run it, the message

[TCustomForm.SetFocus] Form1: TForm1 Can not focus

appears. Next, even if I set a TabOrder ordering,  the keystroke of "TAB" does nothing.

Any ideas, what's wrong?  Epsilon

[Marc]

where and when do you can Edit1.setfocus?

You cannot focus an invisible component.

[epsilon]

O.K. I have to write the code Edit1.setfocus as an OnPaint event of the Form1.
But, I still don't know how to realize the TAB ordering. It really does not work.

[matthijs]

Use the 'ActiveControl' property to set the focus on Edit1 when the forms shows. Right click on the form and set the tab-order anyway you like. I just tried it and it works.

[Marc]

O.K. I have to write the code Edit1.setfocus as an OnPaint event of the Form1.

One of the worst places to place a setfocus is OnPaint. On paint will fire pretty often and thus calling unnesesary setfocus. Besides, changing focus might trigger a repaint which might get into an infinite loop.